Center stop motion for looms



Dec. 27, 1938. G. E. ADAMS 2,141,536

7 CENTER STOP MOTION FOR LQOMS 1 Filed Jan. 10, 1958 v Invenior Beoyqe E. Adams a. yua

Patented Dec. 27, 1938 George E. Adams, Pawtucket, R. 1., assignor to Grompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application January 10, 1938, Serial No. 184,210

2 Claims.

Fig. l is a longitudinal vertical section through This invention relates to improvements in filling stop motions for looms and it is the general object of the invention to provide a construction whereby the shock incident to the knocking-off will appear as the description proceeds, my invention resides in the combination and arrangement of-parts. hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

a portion of a loom showing my improved form of stop motion applied thereto with the lay in rear position and the fork raised preparatory to hind the axis of the lay, as shown in Knowles Patent 376,774. As a result of this relation rearward motion of the lay will cause a relative upward motion of rod 46, while forward motion of the lay will cause a relative downward motion of :5 operation of the loom' will not be transmitted to a detecting operation, 65

the detector fingers of the stop motion. Fig. 2 is a view similar to Fig. 1, but with the In center stop motions more particularly the lay forward and the fork in stopping position kind used for finer fabrics it is customary to due to absence of weft, the motion of the dagger pivot a set of tines on the lay'in front of the relative to the link being indicated in dotted shuttle path. The knock-off dagger projects forlines, and 10 wardly from the lay and moves toward a notched Fig. 3 isa-horizontal section on line 3-3 of knock-off collar on a roll rod extending under Fig.1. the breast beam and connected to the shipping Referring to the drawing, the loom frame l0 mechanism. When the fork drops into a well has a breast beam H along the under side of in the lay due to absence'of weft the dagger is which extends a rolling rod I? to which is se- -15 raised to engage the collar. During rolling of the cured a collar it having a knock-off notch l4. shaft the dagger is suddenly released from the A shoulder i5 above and behind notch it is notch and snaps away with an abrupt downward formed on the collar to engage dagger D near motion. the end of the knock-off stroke. It isnecessary As heretofore constructed the link which causes for the dagger to enter notch I4 before the lay 20 the fork tense and fall has been pivoted directly reaches front center and the lay continues to tothe dagger carrying lever sothat any motion advance after the rod l2is fully turned, due to of the dagger is communicated to the. fork. It slippage of the brake. The purpose of shoulder has been found that the aforesaid quick motion iii is to free the dagger from the notch so the of the dagger away from the notched collar causes lay can continue to move forwardly without the fork to snap upwardly against the fell of breakage. The unseating of the dagger from the cloth. When the fabric being-woven is delithe notch is followed immediately by a quick cate it is injured by this unnecessary movement downward motion-of the dagger, this motion beof the fork. ing caused by shoulder i5.

It is an important object of my present in- The la'y L has a reed it along which a shuttle vention to provide a connection between the S travels between the upper and lower warp dagger and the fork which shall be positive in shedsW and W, respectively. The cloth C has a one direction but yieldable in the opposite direcfellF which lies at the forward limit of motion tion, the yielding occurring when the dagger snaps of the reed. 1

down from the notched collar so that its motion Secured to the front face of the lay is a bracket willnot be communicated to the fork. The fab- 20 h ving a e n 21 in wh h i iournaled a lie is thereby spared theinjury-incident to the shaft 22. The latter has fastened thereto a plate operation of old forms of link. 23 and a link 2d .has a rod head 25 pivoted on On awell-known type of center stop motion a p 25 Secured in the plate 23. The times forlight fabric looms it iscustomary to raise of the filling fork 3!? are ecured in the conthe fork by a rod which is caused to move upventional manner to a barrel 3i secured to the wardly relatively to the lay when the latter moves shaft 22. The lay has a well 32 into which the rearwardly, this motion also depressing the fork 35 can fall when weft is absent. dagger; Asthe lay moves forwardly there is a The bracket 29 has a forwardly extending arm relative downward motion of the rod so that 35 carrying a stud 35 on which is pivoted a dagger the forkfalls and the dagger rises by the action carrying lever 37 from the forward end of which of a light spring. It is a further object of my p ojects the d ger D held in adjuste position present invention to apply the force of this rod by a Set Screw 39- A light torsion Spring 59 a directly to the link and permit the dagger to have the outer end thereof secured to the stud 3B a motion independent of the link, The force and has the inner end extended rearwardly as from the rod may be transmitted through an at 4! to lie over a lug 0 a rearwardly 8 enlarged head formed'on the bottom of the link tending arm 43 of lever 31. andserving as a stop for the dagger carrying A depending guide $5 on the bracket 20 rel ceives the upper end of a pump rod 46, the lower With these and other objects in view which end of which not shown moves about a pivot be- 55 said rod 46, the latter motion corresponding to and permitting the detecting or falling stroke of the fork 30. When the rod 46 is down spring 40 lifts the dagger so that it can enter the notch l4 should'weft be absent.

The matter thus far described may be constructed substantially as heretofore, the rod 46 rising and falling relatively to the lay as the lay moves backwardly and forwardly and the notch l4 being positioned for engagement with the dagger which is normally urged to enter the notch by spring 48. For a further description of a center stop motion having characteristics already described reference may be had to McGuiness Patent No. 1,223,708. If made according to both the Knowles and McGuiness patents and as used generally in the industry, the lower end of the link 24 would be pivoted directly to the arm 43,

but in that construction the quick downward 'motion of the dagger as it leaves the notch M would cause an abrupt upward motion of fork 30 against the fell F of the cloth.

My invention aims to eliminate the direct pivotal connection between the link and the dagger carrying lever and the substitution therefor of the connection which permits the positive transmission of forces upwardly to raise the fork and lower the dagger, but in which the arm 43 may rise relatively to the link when the latter is down. These results I accomplish by forming the rear end of arm 43 with a slot 58 through which extends the lower end of the link 24. A head 5| preferably formed integrally with the link 24 lies under the arm 43 in a position to receive the upward thrust of rod 46. A lay carried stop 6!) may be positioned to engage the top of arm 43 to limit downward motion of the forward end of the dagger so that the same may not engage the take-up roll not shown.

In the operation of my invention upward thrust of rod 46 elevates head 5! and link 24, thereby raising fork 33 and depressing dagger D to the position shown in Fig. 1. As the lay, moves forwardly the relative downward motion of rod 46 permits the spring 40 to lower arm' 43 and raise the dagger. This downward motion ofarm 43 acts through head M to lower. the link 24 and thereby require the fork 30 to move toward the well 32. If sufficient weft is present the fork will be arrested in its downward motion and head 5! will be stopped at some point above its lowest possible position corresponding to a location of the dagger at a distance below the collar l3 to avoid contact therewith. Should weft be absent, however, the fork and link 24 will con tinue to descend and the spring will raise the dagger so that it will enter the match it. Head 5! acts as a stop for the dagger, and a pin 10 fixed on bracket 20 engages shoulder 6| of disk 23 to limit down motion of the link. The dagger is thus positioned to enter notch l4. As the lay moves forwardly the dagger rocks collar I3 and shaft l2 in a clockwise direction as viewed in Fig. 1 to stop the loom. Shoulder l5 kicks the dagger down from the full to the dotted line position of Fig. 2 as already described. This motion can occur without being transmitted to the fork inasmuch as the arm 43 is free to rise above the head 5| as shown in dotted lines inFig. 2 without causing upward motion of either the link 24 or the fork 3B. The fell of the cloth is therefore spared the abrasion which has formerly attended the stopping of the loom and growing out opposite the actuator, said of the fact that the lower end of link 54 has previously been pivoted directly to the lever 31.

From the foregoing it will be seen that I have provided simple means for coupling the filling fork and the dagger in such a way that both can be'controlled by the rod 46 preparatory to a detecting operation, but that after the detecting has been completed and the dagger is in contact with the collar 1 3 the dagger can move down without disturbing the filling fork in the well.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited tothe details. herein disclosed, but what I claim is:

1. In a filling stop motion for a. loom having a lay, a filling fork pivoted to the lay,'loom stopplug mechanism, a pivotally mounted collar forming part of the stopping mechanism and having a notch and a shoulder at one side of the notch movable in a direction toward the notch during a loom stopping operation, a dagger carried by the lay to enter the notch and cause pivoted motion of the collar on loom stopping operations and causing the shoulder to move against the dagger to dislodge the latter from the notch, an actuator moving in one direction as the lay moves rearwardlyand moving in the opposite direction as the lay moves forwardly, a link movingwith the filling fork and having a head on the end thereof remote from the fork for engagement with the actuator, and an arm moving with the dagger bearing against that side of the head arm being movable away from the head independently of motion of the link when said shoulder dislodges the dagger from the notch.

2. In a' filling stop motion for a loom having a reciprocating lay,ja filling fork pivoted to the lay for vertical motion relatively to the latter, a link connected to the filling fork movable vertically with ment of the filling fork, a head formed on the lower end of the link, an actuator .for the link having a motion upwardly relatively to the lay,

to engage the head and cause lifting of the'link and fork as the lay moves rearwardly, saidactuator movable downwardly relatively to the lay as the latter moves forwardly and the fork and link being capable of downward motion relatively to the lay as the latter moves forward,

a dagger pivoted to the lay and having an arm to bear against that part of the head opposite the actuator, loom stopping mechanism including a collar having a notch therein and a shoulder at one side of the notch, the dagger to'enter the 'notch on stopping beats of the loom to cause movement of the collar and said shoulder movable against the dagger to dislodge the latter from the notch, said arm being 'movable away from the head independently of the link when the dagger is dislodged from the notch by said shoulder, and resilient means acting upon the dagger and arm tending normally to move the dagger toward position for engagement with the notch of the collar and also normally exerting a force on the head in a direction toward the actuator to cause downward motion of the fork relatively to the lay when the actuator has a downward motion relatively to the lay on forward beats of the latter.

GEORGE E. ADAMS.

respect to the lay to cause move-,- 

